Image capture device

Abstract

An image capture device includes a light source, an image capture circuit, and a processor. The light source is used for generating emitting light. The image capture circuit is used for capturing an image corresponding to the emitting light. The processor is coupled to the light source and the image capture circuit for optionally adjusting the intensity of the emitting light of the light source according to luminance corresponding to the image and a target value.

What is claimed is: 
     
       1. An image capture device, comprising:
 a light source generating emitting light; 
 an image capture circuit capturing a captured image corresponding to a user, wherein an image capture range of the image capture circuit is substantially equal to an emitting angle of the light source; and 
 a processor coupled to the image capture circuit and the light source; 
 wherein when a corresponding value of a preselected physical factor of the captured image is greater than a preset target value, the processor controls the light source to reduce intensity of the emitting light such that the corresponding value of the preselected physical factor of a new captured image from the image capture circuit is close to the preset target value, wherein the preset target value is set according to a reflection coefficient of a human skin corresponding to the emitting light. 
 
     
     
       2. The image capture device of  claim 1 , wherein the processor generates a luminance histogram according to the captured image. 
     
     
       3. The image capture device of  claim 1 , wherein the processor optionally adjusts the intensity of the emitting light of the light source in order to ensure that the light source does not damage eyes of the user within a maximum operation distance of the emitting light. 
     
     
       4. An image capture device, comprising:
 a light source generating emitting light; 
 an image capture circuit capturing a captured image corresponding to a user, wherein an image capture range of the image capture circuit is substantially equal to an emitting angle of the light source; and 
 a processor coupled to the image capture circuit and the light source; 
 wherein when a corresponding value of a preselected physical factor of the captured image is greater than a preset target value, the processor controls the light source to reduce intensity of the emitting light such that the corresponding value of the preselected physical factor of a new captured image from the image capture circuit is close to the preset target value, wherein the preset target value is set according to intensity of a reflection light corresponding to the emitting light and intensity of the emitting light-to prevent eyes of the user from hurt.